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Most Accurate Real-Time Crypto Data
Data Engineered with Oracles.
Adopted by Developers.
Crypto is decentralised and so are its prices. Blocksize aggregates 70+ exchanges in real time into one price per pair, and prices tokenized stocks the same way. One API, one key, WebSocket and REST.
BTC/USD: realtime_vwap
$...
ETH/USD: realtime_vwap
$...
SOL/USD: realtime_vwap
$...
Why Not Just Use Single Exchange Prices?
No single exchange captures a market where liquidity is fragmented. Even the deepest exchanges sit within market-wide fair value only about 25% of the time. Blocksize aggregates 70+ exchanges in real time, filters outliers, weights dynamically and delivers one price.
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One Price, Whole Market
We aggregate in real time across all major exchanges and verify the result on-chain, so the price delivered is the one the market agrees on.
<250ms
Latency
9000+
Price Pairs
70+
(D)Exchanges
99.9%
Uptime guarantee
Crypto feeds
One price per pair from 70+ exchanges- Real-time VWAP
- Bid/ask
- State price
- Historical prices
- Trades
Built for Seamless Integration
API documentation covering WebSocket streams, REST endpoints, authentication and payload structures, ready to use with AI coding tools.
Tokenized stocks use the bid/ask methods: subscribe to AAPL_AGG like any other instrument.
Pricing Packages
Prices for Individual Use Cases
-
Developer
RecommendedFor simple apps, scripts, or dashboards that need reliable crypto prices without complexity.
€49 / month
Billed monthly · €499 if billed yearly
€499 / year
Billed yearly · save €89 a year
- Assets
- Crypto RWA
- Price types
- VWAP, bid/ask, daily close (NAV)
- Active feeds
- 5
- Historical data
- 7 days
- Seats
- 1
- Support
- Docs, email
-
Start-Up
For teams building products that rely on consistent, scalable pricing across multiple assets.
€299 / month
Billed monthly · €3,049 if billed yearly
€3,049 / year
Billed yearly · save €539 a year
- Assets
- Crypto RWA
- Price types
- VWAP, bid/ask, daily close (NAV)
- Active feeds
- 50
- Historical data
- 1 month
- Seats
- 5
- Support
- Docs, email
-
Business
For teams running best execution, benchmarking, surveillance, or risk management.
€799 / month
Billed monthly · €8,149 if billed yearly
€8,149 / year
Billed yearly · save €1,439 a year
- Assets
- Crypto RWA
- Price types
- VWAP, bid/ask, daily close (NAV), AMM state prices
- Active feeds
- 350
- Historical data
- 3 months
- Seats
- 10
- Support
- Docs, email, Slack (4 h response)
Enterprise
Custom
For institutions, oracles, and systems requiring oracle-grade live aggregation and accuracy.
- Unlimited feeds
- AMM state prices
- Commodities
- HTTP delivery
- History on request
- Custom seats
- Slack (1 h response)
- 24/7 phone escalation
- Custom feeds on request
- 99.9% uptime SLA
Behind the Data
Blocksize Crypto and RWA Data FAQ
Common questions before you integrate
Yes. Blocksize gives agent builders a public remote MCP server and x402-protected HTTP market data for live paid access, so AI agents can access crypto data directly.
Sign up for a free trial, generate your API key from the dashboard. One key works for both WebSocket and REST endpoints.
Developer tier includes 1 API key. Need more? Upgrade to Startup (5 keys) or Business (10 keys).
Real-time VWAP, bid/ask, 30-minute VWAP, 24-hour VWAP and state prices for crypto, depending on the tier. Bid/ask feeds for 35 tokenized stocks, gold and silver.
Sub-250 ms for real-time updates.
70+ centralised and decentralised exchanges, 9,000+ crypto pairs, plus 35 tokenized stocks, gold and silver.
Through the bid/ask endpoints. The instruments carry the suffix _AGG and are listed by bidask_instruments.